Sonic the Hedgehog 3

Dr. Robotnik - who now prefers the name Eggman - has resorted to living underground after a major loss to Sonic the Hedgehog. Still in communication with Agent Stone, he uses the agent to uncover something that can defeat Sonic. Enter Shadow the Hedgehog, a near replica of the blue blur created by Eggman's grandfather. Eggman convinces Shadow to find the Master Emerald so they can get what they want. However, Sonic, Tails, and Knuckles aren't so generous. In a desperate attempt to prevent Shadow from succeeding, Knuckles shatters the Master Emerald, causing all seven chaos emeralds to scatter across Earth. It is a race against the clock as Sonic and friends try to retrieve all seven emeralds before Shadow does. Along the way, they will encounter the return of Eggman, but not without running into some new faces.